Finding the Fourth Proportional to 1,493.72, 2,240.72 and 398.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,493.72 : 2,240.72 = 398.10 : x
2. Step 2: Convert to fraction form
   1,493.72/2,240.72 = 398.10/x
3. Step 3: Cross multiply
   1,493.72x = 2,240.72 × 398.10
4. Step 4: Simplify right side
   1,493.72x = 892,030.63
5. Step 5: Solve for x
   x = 892,030.63/1,493.72
6. Step 6: Final answer
   x = 597.19